Willpower:

Did you make your parents get you a trumpet in fifth grade only to give it up as soon as you learned you hated practicing?

Not the band nerds! They stuck with that thing as weeks turned into months and months turned into years. The great news for them is that studies have shown that people who have willpower over one aspect of life generally have it over other aspects as well. The will of the master band nerd is unbreakable!